Most homeowners would prefer grass to a lawn full of weeds,

but the forensic scientist's weeds can tell a story.

With the help of a plant biologist and a new high-tech computer program,

investigators solved the mystery of a young girl's murder.

No. Investigators solved the mystery of the young girls' murder. Weekends were typically busy in the Mouser household.

One Saturday morning in 1995, as Kathy Mouser was leaving for work, she reminded her 14-year-old

daughter Jenna that she was grounded for the weekend and wasn't allowed to use the telephone

either.

Jenna was having some behavioral issues.

A lot of 14-year-olds, 15-year-olds might have those kinds of issues when they're

growing up, lots of pressures, social pressures, problems within the family.

She was having such trouble that the family was taking her to counseling.

Kathy returned home from work around 1 p.m.

And as soon as she tried to open the door,

she knew something was wrong.

Mrs. Mouser found the front door locked,

which she said was unusual

because usually there's somebody there.

And she was expecting Jenna to be there,

so the front door would have been unlocked.

Jenna wasn't home,

and she hadn't left the notes saying where she went.

...